Chevron has improved the quality of its convenience stores in recent times, and starting this month, it’s taking yet another step in the evolution of Chevron ExtraMile. The West Coast c-store chain is currently rolling out Seattle's Best Coffee to all of its 271 company-owned and 273 franchise ExtraMile locations. The approximately six-week deployment is scheduled to finish in June. "Coffee is a really important part of our offering," said Ian Noble, retail district sales manager for the company.